Introduction to Defence Studies and National Security
What this domain tests
Introduction to Defence Studies and National Security asks you to distinguish defence from security, identify threats and explain India's apex security machinery. Questions often use a short scenario and ask you to classify the threat or name the body that coordinates a response.
Core rules and concepts
- Defence is protection against military attack; national security is broader and includes economic, energy, food, cyber, environmental and social security.
- National power is applied through diplomatic, informational, military and economic instruments, often called DIME.
- Threats can be conventional (border war), sub-conventional (terrorism, insurgency) or hybrid (cyber attack, disinformation and economic coercion combined).
- The Cabinet Committee on Security (CCS), chaired by the Prime Minister, is the apex decision body. The National Security Council advises on strategy, supported by the National Security Advisor and the Strategic Policy Group.
- Deterrence means preventing an adversary from acting by credible capability and will; strategic autonomy means independent decision-making.
Worked example
A foreign group disables a state electricity grid and spreads fake videos to cause panic. Is this a defence problem or a security problem? Reasoning: the targets are civilian infrastructure and public confidence, and the methods are cyber and informational, not a conventional military attack. It is a hybrid security threat. The response involves cyber security, intelligence, police, power utilities and media literacy, with the armed forces only one part of the answer.
Traps that cost marks
Do not write that defence and national security are the same. Do not reduce every threat to a military response. Do not call the NSA the commander of the armed forces; operational command belongs to the service chiefs and, for joint matters, the CDS framework.